Hoisting mechanism



R. E. GURLEY.

HOISTLNG NIECHANISM.

APPLICATION FILED IUNE 2I, I9I9.

Patented Jan. 24, 1922.

3 SHEETS`SHEET l.

R. E. GURLEY.

, HOISTING MECHANISM.

APPLICATION man JUNE 21.1919.

3 SHEETS-SHEET 2.

R. E. GUR'LEY., Holsm MEcHANlsM.

APPLICATION FILED JUNEZI, i919- 1,404,287 Patented Jan. 24, 1922.

3 SHEETS-SHEET 3.

UNITED j YSTATES PATENT OSF-FICE.`

ROBERT E. GURLEY, OFCHICAGO, ILLINOIS, ASSIGNOR TO T. W. SNOW CONSTRUCTION COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

HOISTING MECHANISM.

Specification of Letters Patent.

Patented Jan. 24, 1922.

Application' led June 21, 1919. Serial No. 305,822.

To all fr0/0m t may concern.'

Beit known that I, ROBERT E. GURLEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new anduseful Impiovement in Hoisting Mechanism, of which the following is a specification.

My invention relates as to certain features thereof, generally to machines involving a member adapted tobe moved in opposite directions, with means for effecting such'movements of the member'automatically, such as for example, automatically operating hoists, planers and other structures; and as to the other features thereof to hoists and the like machines.

My objects, generally stated, are to provide for the operation of a member adapted to be moved in opposite directions, in such a manner that a sutl'icient interval of time will lapse between the engagement of the drivn ing means therewith lfor moving it in one direction and the engagement of such means for moving it in the opposite direction; and that-such intervals will occur atthe proper time relative to the operation of such member throughout the continued operation of the latter.

Further objects, and Vthese more particularly in connection with the employment of n l my invention in hoist mechanism, are to provide novel, simple, positive and safely operating means for automatically operating the hoist in opposite directions, with the lapsing` of the desired intervals of time between the automatic stopping of the hoist in its movement in one direction and the automatic starting `of the hoist to move it in the opposite direction; to Yprovide in ahoist employing means preventing the rotation of the hoist in a reversedirection under the action of theV load, means whereby the braking means just referred to will be automatically positioned for operation in the rotation of the hoist in either direction should a condition occur wherein the weight of the load reversely operates the hoist, and will remain in position to operate as a brake for the hoist during the time that the di'iving means are disconnected therefrom in the reversing operation and until the load on the hoistand which would reverse the hoist if the machine should break or the power fail,

has been removed; to `provide means for accomplishing the above stated results, which may be applied to automatic-stopping hoist machines as commonly provided; and other objects as will be manifest from the following description.

I have devised my improvements for use more particularly inv connection with hoisting machines, such for example, as the kind shown in U. S. Patent N o. 963,384, granted to R. A. Ogle, July 5, 1910, and have therefore chosen to illustrate them as embodied in a machine of this general construction, though without intending to limit the invention thereto.

Referring to the -accompanying drawings- Figure 1 is a view in side elevation of a hoisting machine embodying my improvements. Figure 2 is a plan view of the machine of Fig. V1, with a portion of a shaft broken away. Fig. 3 is a section taken at the irregular line 3M?) on Fig. 2 and viewed in the direction of the arrows, certain parts being broken away. Fig. 4f is a broken section taken at the line 4 on Fig. 2 and viewed in the direction of the arrow; and Fig. 5, a View in sectional elevation of one of the similar dash-pot mechanisms employed.

As a preface to the following description, it may be stated that the hoist as shown is adapted to be employed for the operation of a pair of buckets (not shown) moving in opposite directions or a single bucket in which case the cable at the endthereof not connected with a bucket, carries a counterweight which is heavier than the empty bucket on the other end of theA cable, the buckets where two are employed being so disposed with relation to loading pits and dumping points that one bucket is down in its co-operating pit and is being loaded, while the -other bucket is elevated tothe dumping position, and is dumping.

The frame 7 of the hoist comprises two side members 8 and S spaced apart, as represented and provided at their upper ends with bearings 9 and 10 in which two shafts 11 and 12 extending transversely of the machine, are journaled. The shaft 12 carries intermediate its ends, a drum 13, aboutv which the cable (not shown) to the opposite ends of which the buckets referred to would be attached, is wound. This drum is rotatable on the shaft 12, it being adapted to be clutched to the latter by means of a clutch (not shown), but operated through the me- 'naled in bearings 18 at the opposite sides of the frame 7, and carries towards its opposite ends pinions V19'and 20, which are freely rotatable thereon and are adaptedk to be alternately clutched to the shaft 17 by clutches 21 and 22, respectively, operating in a wellknown manner through the medium of a horizontally swinging lever 23 fulcrumed between its ends, as indicated at 24, on a stationary sleeve 25 surrounding a shaft 26 journaled in bearings 27 (one only of which is shown) on the frame 7 at opposite sides thereof and held against longitudinal movement thereon by sleeves 28 and 29 on the Y shaft 26.

vfor driving the shaft 12 and its drum in one direction, whereas when the clutch 21 is thrown in, the gear 30 is driven through the medium of the gears 19, 34 and 31, thus re- ,versing its direction of movement and that of the shaft 12 and the drum carried thereby.

The hoist, as shown, is provided with means for controlling the movement of the drum 13 in opposite directions and applying a brake to the drum in the event of the breaking of apart of the machine or the Yfailure of power, which would allow the drum to run free, these means being automatic and of which the following is a description. Journaled in bearings 35 on the frame-sides is a shaft 36 carrying a crank 37, the crank-pin 3 8 of which is equipped with a roller 39 located within an aperture 40 provided in the upper end of a rock-arm 41 pivoted at its lower end at 42 to the frame of the machine, this arm surrounding at its opening 40 the shaft 36 and being adapted to be rocked on its fulcrum 42 by. the rotation of the crank 37. The upper end of the arm 41 is pivotally connected at 43 with one end ofl a rod 44, the opposite end of this rod being pivotally connected at 45 at a yoke thereon, with one end of the bell-crank 23,

whereby the rocking of the shaft 36 in opposite directions alternately moves the clutches 21 and 22 into operative position. Rotatably mounted on the shaft 36 is a yoke-shaped frame 46, opposite sides of which contain longitudinally-extending slots (not shown), but corresponding with the slots in the cor responding yoke member of the said patent, these slots serving as guides for the ends 47 of a pawl device 48 having screw-threaded connection with the threaded portion 39 of the shaft 36 within the confines of the frame 46. The frame 46 is rigid with a sprocketwheel 50, connected by a chain 51 with the sprocket-wheel 16, whereby in the rotation of the drum 13 the yoke 46 and the pawl device 48 are rotated and the latter is carried along the shaft 36 by reason of its threaded connection therewith in one direction or the other in F ig. 2, depending on the direction in which the drum 13 is rotated. The pawl 4device 48 is formed on its opposite faces with oppositely disposed shoulders 51 and 52, which are adapted to alternately engage with shoulders 53 and 54, respectively, formed on dogs 55 and 56, rigidly secured to the shaft 36, but adjustable lengthwise thereon by clamping means indicated at 157 and 57a, re-

spectively, whereby engagement of the shoulders 51 and 52 with their respective co-opcrating shoulders 53 and 54 operate to rock the shaft 36 for moving the drive-shaft clutchmechanism to normal inoperative and neutral position for stopping the machine, as is hereinafter more fully explained. Looped about the periphery of a flange 57 on the drum 13, is a brake-strap 58, the inner surface of which is provided with friction blocks 59 of wood, or any other suitable material, spaced apart, the lower ends of the -strap 58 being pivotally connected at 60 with an upwardly extending arm 61 rigidly secured to a shaft 62 journaled in the frame 7 at opposite sides of the machine, this shaft being equipped with an upwardly extending arm 63 carrying a weight 64 at its upper end and pivotally connected as indicated at 65 with a link 66 which extends into the space between a pair of segmental plates 67 spaced apart and rigidly secured to the shaft 36,

this end of the link 66 carrying a cross-pin 68 which extends into opposed arc-shaped slots 69 arranged in the plates 67 concentrically of the axis of the shaft 36. TheV brake-strap 58 is so adjusted about the drum flange 57 that when the parts of the mechanism are in neutral position hereinafter referred to, the band brake formed of the strap 58 and blocks 59 extends loosely about the drum flange 57, but when the arm 61 is shifted to either side of the vertical position, the brake-band will be in position for gripping the drum in case of accident effecting reversal of the latter as hereinafter more fully explained. The outer end of the shaft 36 Visequipped withanarm .165.carrying a weight 166, this weighted arm co-opera-ting with a rock-frame 167 of general V-shape form fulcrumed at its lower end on a pin 168 to the frame 7. The frame .167 is formed of two similar bars 169 ofthe shape referred to, these bars being connected .together through the medium of lcross-pins 70, 71, 7 2a and 73, the pins 70 and 71 being located at the extremities of Ithe member 167 and the pins 72'Ll and 7 3a between the extremities thereof and thepivot 168. The lever 165 is so positioned that it extends in a. plane between the planes occupied by the bars 169 and thus in one position engages the pin 71 as shown in the drawings, and in the other position, hereinafter referred to, engages the pin 70, the frame `167 being rocked-in opposite directions on its pivot 168'by t-he engagement therewith of the-lever 165. Mounted below the frame 167 are devices for cushioning the movement of the frame 167 in opposite directions and controlling the speed at which this frame rocks under the action of the weighted'lever 165, for the purpose hereinafter explained. These devices comprise cylinders 72 and 73 fulcrumed attheir lower ends, as indicated at 74 and 75, respectively, on the frame of the machine, these cylinders containing pistons (the one for the cylinder 73 being represented at 75), which are connected, respectively, with piston-rods 76 and 77, pivotally connected, respectively, with the pins 72a and 73". Each cylinder is formed on its inner surface with a. by-pass 78 opening at its upper and lower ends into the interior of the cylinder and at its lower end contains a valved vent 79.

he operation of the-apparatus ris as follows: The machine is shown inthe position it assumes during the driving of the drum 13 in one direction, namely, in clockwise direction lin Fig. 1, the drive being from the shaft 17 through the clutch 22, gear 20, gear 30, shaft .1.1, -gear 32, gear 33 to drum 13, thus rotating the yoke 46 in clockwise direction in Fig. 1, Vwhich causes the pawl device 48 to move along the yoke 46 toward the dog In the continued movement of the parts as stated, the tooth 51 engages the tooth 53 on `the dog 55, thus rotating the shaft 36 in clockwise direction in Fig. 1, with the result of throwing the lever 165 to the rightl ini Fig. 1, tol a position in which it extends to the right beyond perpendicular position, and the crank-arm 37 is rotated in the aperture 40 of the arm 41. In the rotation of the crank-arm 37 against the arm as stated, the clutch-lever 23 is rocked in clockwise direction in Fig. 2` with the result of shifting the clutch mechanisms on the shaft 17 to a position in which neither the gear 19 nor the gear 2O is clutched to this shaft, or in other words, to a position where the parts are in neutral condition. The lever 165gby moving to the right of the perpendicular, before the drive of the drum 13 from the shaft 17 is discontinued, operates by its weight to continue the movement of the shaft 36 in clockwise direction in Fig. 3 to a position in which the crank .37 is diametrically opposed to the position thereof shown in Fig. 3, in

vmoving to which position the lever 23 is rocked in clockwise direction in Fig. 2 to a position in which the gear 19 is clutched to the shaft 17 through the medium of the clutch 21, whereupon the drive of the drum 1.3 is reversed, it being then driven from the shaft 17, clutch 21, gears 19 and 34, shaft 26, gears 31 and 30, shaft 11 and gears 32 and 33.

In the movement of the lever 165 to rotate the shaft 36 for throwing in the-clutch 21 as stated, the lever 165 bears against the pin 70, thereby rocking the frame 167 in clockwise direction( in Fig. 1, this movement of the member 167 being retarded by the dash-pot mechanism involving the cylinder 72, which operates to cause the initial rocking movement of the member 167 to be relatively slow, its movement being regulated by the extent to which thevalve 79 of the cylinder 72 isopened, but after the piston passes the upper end of the by-pass 78, it lowers relatively quickly until it reaches practically the end of its downward movement, the air in the bottom of the cylinder then operating as a cushion. The parts of the structure are so constructed and arranged that during the movement of the piston to a. point where it uncovers the upper end of the by-pass 78 to the atmosphere, the clutches 21 and 22 are in neutral position, the clutch 21 clutching the gear 19 to the shaft 17 in 105 the movement of the piston below the point at which the by-pass 78 communicates at its upper end with the atmosphere, with the result of causing the clutch 21 to be relatively oluickl;7 shifted into posit-ion fol- 110 lowing the interval during which it is in neutral position.

The brake mechanism referred to when in the position shown in the dra-wings, operates to permit the shaft 12 to freelyv rotate in 115 clockwise direction in Fig. 1, but should this shaft start to rotate in the opposite direction, with the parts in the yposition shown in the drawings, as for example, under the action of a loaded bucket.l should an accident 120 occur or should the power be cut off. the brake mechanism referred to will immediately grip the drum vflange 57 and lock the drum against rotation.

From the foregoing description it will be 125 understood that in the yrot-ation of the shaft 36 in clockwise direction in Fig. 1, as above explained, the plates 67 will. during a portion ofthe movement of this shaft. rotate at their slotted portions 6901i thepin 68 without 130 moving the lever 63, but as soon as the ends of these slots shown uppermost in Fig. 4, move toa position in which they strike the pin 68, the lever 63, upon continued rotation of the shaft 36, is shifted to the left Vin Fig. 4 by means of the link 66, thereby swinging the lever 61 to the left in this figure and Vso positioning the brake device lformed of the-band 58 and blocks 59 that itv will permit the shaft 12 to rotate freely in anti-clockwise direction in Fig. 1, but serve as a brake for the shaft shouldV conditions cause it to reversely rotate. The parts of the mechanism just described, in practice are so constructed and arranged that the arm 63 will remain in the position shown in Fig. 1 until the conditions are suoli that the force tending to rotate the drum reversely has been removed, as for example, when two lbuckets are employed, until the force exerted by the loaded bucket, on the drum tending to rotate it reversely has become so reduced, as in the discharging of its contents, that the drum is not subjected to a force tending to'reversely rotate it, in the particular construction shown, the arm 63 remaining in the position shown in Fig. 1 until the mechanism rocking the lever 23 has moved automatically, as hereinbefore explained, to a position in which the clutch 21 starts to ygrip the gear 19 to the shaft 17 which occurs after the load tending to reverse the drum has f been removed. Thus while the drive'for the drum is in neutral position, the brake device remains set in such position that should the drum then begin to reverselyrotate, as for example, by the breaking of a part of the machine or by discontinuance of the supplying of power to the machine while a load is exerting a force on the drum tending to rotate it reversely, the drum in such reverse rotation will be immediately arrested.

In the rotation of the drum 13 in counterclockwise direction in Fig. 1, following the shifting of the clutch 21 into operative position as hereinbefore explained, the yoke 46 is also rotated in anti-clockwise direction in Fig. 1, thus causing the pawl 48 to move along the frame 46 on the threaded portion 49 of the shaft 36'toward the dog 56, the pawl 48 engaging at its shoulder 52 with the shoulder 54 on the dog 56, in the movement of the pawl 48 as stated, thus rotating the shaft 36 in anti-clockwise direction in Fig. 1, which throws the lever 165 to the left in the drawings beyond the perpendicular, in which position it opposes the pin 71 and rocks the rock-member 167 in anti-clockwise direction in Fig. 1, the dash-pot mechanism involving the cylinder 73 operating to retard the lowering of the lever 165 and consequently the rotation of the shaft 36, in the same manner in which the other dashpot mechanism retarded the movement of thel lever 165 in clockwise direction in Fig. 1

as hereinbefore explained, the rotation of vthe shaft 36 in anti-clockwise direction as stated operating to irst Vshift the clutches on the shaftv 17 into neutral condition and following this operation, clutching the gear 20 to this shaft through the medium of the clutch 22,'the arm 63 inthe final movement of the shaft 36 in anti-clockwise direction shifting to the position shown in Fig. 4, just as the clutch 22 goes in, for so positioning the brake device formed ofl the band 5S and blocks 59, that thedruinmay rotate freelyV in clockwise direction in Fig. 1, but be arrested in case it starts to reversely rotate. Y

It will be understood fromthe foregoing that by the provision of the'mechanism as stated there is a lapsing of a predetermined length of timebetween the disengagement of one clutch controlling the driving of the drum inV one direction and the engagement of the clutch controlling the driving of the drum in the opposite direction, this interval being afforded for the purpose of effecting the loading and the dumping of the buckets in alternation with the hoisting operations, it being understood that the length of this interval may be readilyr varied, as desired, as by adjusting the valves 7 9.

It will be noted that the automaticallyoperating drum-reversing-and-brake-control ling mechanism is operated at all times synchronously with the drum, in the particular construction illustrated by the direct drive connection through the sprocket-chain 51 between the drum and this mechanism, and thus even should the clutches slip, it will not affect'the operation of the mechanism referred to in properly timed relation to the drum.

If desired the mechanism may be rendered While I have illustrated a particular construction embodying my invention and shown it as applied to a certain type of device, I do not wish to be understood as 'intending to limit it thereto, as the invention may be provided in other forms and employed in connection with other kinds and types of machines.

What I claim as new and desire to secure by Letters Patent is: Y

1. The combination of a driving member. mechanism driven thereby and including a second member adapted to be moved in opposite directions, and means adapted to drive said second member from said driving member in opposite directions alternately and including clutch mechanism, and means operated by said first-referred to mechanism and operating automatically upon said clutch mechanism, tov cause the said irst-named means to operate said second member automatically in opposite directions involving a rock-member actuatedin opposite directions by said mechanism said rock-member having a portion disposed eccentrically of the axis of said rock-member, which, in the actuations of said rocksmember is moved beyond perpendicular position and' operates to finish the throw of said rock-member for effecting the shifting of the clutch mechanism to re verse the movement of said second member.

2. The combination of a driving member. mechanism driven thereby and including a second member adapted to be moved in oppo site directions, and means adapted to drive said second member from said driving member in opposite directions alternately, and means opera-ted by said mechanism and operating automatically upon said first-named means, to cause the latter to'operate said second member automatically in opposite directions involving a rock-member actuated in opposite directions by said mechanism. said rock-member having a portion disposed eccentrically of the axis of said rock-meniber, which, in the actuations of said rockmember is moved beyond perpendicular position and operates to finish the throw of said rock-memberfor effecting the reversal of the movement of said second member, and means for retal'ding the movement of said rockmember under the action of said eccentrically disposed portion.

3. The combination of a driving member, mechanism driven thereby and including a second memberadapted to be moved in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately, and

means operated by said mechanism and 0p-V erating automatically upon said first-named means, to cause the latter to operate said second member automatically in opposite directions involving a rock-member actuated in opposite directions by said mechanism, said rock-member having a portion disposed eccentrically of the aXis of: said rock-member. which, in the actuations of said rockmember is moved beyond perpendicular po sition and operates to finish the throw of said roclz-nember for effecting the reversal of' the movement of said second member, and dash-pot mechanism for retarding the movement of said rock-member under the action of said eccentrically disposed portion.

si. The combination of a. driving member, mechanism driven thereby and including a second member adapted to be moved in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately, and means operated by said mechanism and operating automatically upon said first-'named means, to cause the latter to operate said Second member automatically in opposite directions involving a rock-member actuated in opposite directions by said mechanism, said rock-member having a portion disposed eccentrica-lly of the axis of said rock-member, lwhich in the actuations of said rockmember is moved beyond perpendicular position and operates to finish the throw of said rock-member for effecting the reversal of the movement of said second member, and a rock-frame operatedin opposite directions by engagement therewith of said rock-member in itscmovement in opposite directions, and rocking under the action of said rockmember.

5. The combination of a driving member, mechanism driven thereby and including a second member adapted to be moved in opposite directions, and means adapted to drive said second member from said driving member in opposite directions alternately, and means operated by said mechanism and operating automatically upon said first-named means, to cause the latter to operate said second member automatically in opposite directions involving a rock-member actuated in opposite directions by said mechanism. said rock-member having a portion disposed eccentrically of' the axis of said rock-member, which, in the actuations of said rockmember is moved beyond perpendicular position and operates to finish the throw of said rock-member for effecting the reversal of the movement of said second member, a rock-frame operated in opposite directions by engagement therewith of said rock-member in its movement in opposite directions, and

`rocking under the action of said-rock-mem- 4eccentrically of the axis of said rock-member, which, in the actuations of said rockmember is moved beyond perpendicular position and operates to finish the throw of said rock-member for effecting the reversal of the movement of said second member, a rock-frame operated in opposite directions by engagement therewith of' said rock-mem ber in its movement in opposite directions, and rocking under the action ofsaid rockmember, and dash-pot mechanism for retarding the movement of said rock-frame in opposite directions.

v7; The combination of a driving member, mechanism driven thereby and including a second member adapted to be moved in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately, and means operated by said mechanism and operating automatically upon said iirst-named means, to cause the latter to operate said second member automatically in opposite directions involving a rock-member actuated in opposite directions by said mechanism, said rock-member having a portion disposed eccentrically of the axis of said rock-meinber, which, in the actuations of said rockmember is moved beyond perpendicular position and operates to nish the throw of said rock-member for eiecting the reversal of the movement of said second member, a rock-frame operated in opposite directions by engagement therewith of said rock-mem* ber in its movement in opposite directions, and rocking under the action of said rockmember, and adjustable means for retarding the-movement of said rock-frame in opposite directions. i

8. The combination of a driving member, mechanism driven thereby and including a second member adapted to be moved'in'opposite directions, and means adapted to drive said second member from saiddriving memberV in oppositedirections alternately, vand means operated by said mechanism and operating yautomatically upon said first-named means, to cause the latter to operate said second member automatically in opposite directions involving a rock-member actuated in opposite directions by said mechanism, said rock-member having a portion disposed eccentrically of the axis of said rock-member, which, in the actuations of said`roclrmember is moved beyond perpendicular position and operates to finish the throw of said rock-member for effecting the reversal of the movement of said second member, a rock-frame operated in opposite directions by engagement*therewith ot' said rock-incur bei'v in its movement in opposite directions,

and rocking under the action ol said iock- Y member, and adjustable dash-,pot mechanism for retarding the movement oi' said roc-lirame ,in opposite directions.

9. The combination oil a driving men'lber,

mechanism driven thereby and'including a second member adapted to be moved in op: posite directions, and means adapted to drive said second member from said driving member in opposite directions alternately, and

means operated by said mechanism and op- .ferating automatically upon sai-d irst-named means, to cause the latter to operate said second member automatically in opposite directions, including a device operated by said mechanism for automatically operating` upon said first-named means to-cause the latter to be in neutral position, in which said second member is out of driving engagement with said driving member, and a device operating to thereafter cause-said first-named means to be in a position lfor driving said second member in` a reverse direction.

l0. The combination of a driving member, mechanism driven thereby and including a second member adaptcd'to be moved in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately, and means operated by saidk mechanism and operating automatically-upon said iirst-nained means, to cause the latter to operate said second member automatically in opposite directions, including a device operate-d by said mechanism for automatically operating upon said irst-named means to cause the latter' to be in neutral position in Which said second member is out of'driving engagement with said driving` member, and a device operating to thereafter cause said irst-V named ineans-to be in a position for driving said second member in a reverse direction, and means for regulating the interval durdriving engagement With said driving member. Y

l1. The combination of a driving member, mechanism driven thereby and including a second member adapted to be moved in opposite directions and means adapted to drive said second member from sai-d d 1iving member in opposite directions alternately and including clutch mechanism, and means operated by said irst-reterred-to mechanism and operating automatically upon said clutch mechanism, to cause the said first- .named means to operate said second member automatically in opposite directions involving which said second member` is out of the actuations of said rock-member is moved f to finish the throw of said rocksmember for effecting the shifting oi the clutch mecha'- nism to reverse the movement oil said second member, and means operating automaticallyy to move said rock-member to a position Vin which saideccentricallyY disposed portion extends beyond perpendicularl position.

l2. The combination of a driving member, mechanism driven thereby and including a second,` rotatable, member adapted to be 'rotated i in opposite' directions and means adapted to drivesaid second member from said driving'member in opposite directions alternately in opposition to a force tending to reverse the'rotation or" said secondv meinber, brake-mechanism cooperating with said rotatable member and shiftable to` position said brake mechanism For automatically beyond' perpendicular position and operates stopping said rotatable member in its rotation in either direction when reversely rotated by such a force, and means operating automatically upon said first-named means to cause the latter to operate said second member automatically in'opposite directions and automatically shift said brake mechanism to position the latter for automatic operation in the reverse rotation of said rotatable member by such a force.

13. The combinationl of a driving member, mechanism driven thereby and includ ing a second, rotatable, member adapted to be rotated in opposite directions and means adapted to drive saidseeond member from said driving member in opposite directions alternately in opposition to a force tending to reverse the rotation of said second member, brake mechanism cooperating with said rotatable member and shiftable to position said brakeV mechanism for automatically stopping said rotatable member in its rotation in either direction when. reversely rotated by such a. force, and means operated b y said mechanism and operating` automatically upon said iirst-named means to cause the latter to operate said second member automatically in opposite directions and automatically shift said brake mechanism to position the latter for automaticioperation in the reverse rotation of said rotatable member by such a force.

14. The combination of a driving member, mechanism driven thereby and including a second, rotatable, member` adapted to be rotated in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately in opposition to a force tending` to reverse the rotation of said second member, brake mechanism cooperating. with said rotatable member and shiftable to position said brake mechanism for automatically stopping said rotatablemember in its rotation in either direction when reversely rotated by such a force, and means actuated by said second member andoperatingr auto matically upon said* first-named means to cause the latter to operate said second member automatically in opposite direct-ions and automatically shift said brake mechanism to position the latter for automatic operation in the reverse rotation iof said rotatable member by such a force.

15. The combination-of a driving member. mechanism driven thereby and including` a second, rotatable, member adapted to be rotated in lopposite directions .and'means adapted to drive said second member from said driving member in opposite directions Aalternately in opposition to a force tendine' to reverse the rotation of saidseeond member, brake mechanism cooperating with said rotatable member and shiftable to position said brake mechanism for automatically stopping said rotatable member in its rotation in either' direction when reversely rotated by such a force involving a rock-member provided with an eccentrically disposed portion and an element cooperatingr With said second member for performing the brakinfjr function, and means operating automatically upon said first-named means to cause the latter to opera-te said second member automatically in opposite directions and au tomatically shift said rock-member toposition said braking element for automatic operation in the reverse rotation of said rotatable member by such a force.

16. The combination of a driving member, mechanism driven thereby and including a second, rotatable, member adapted to be 1'0- tated in opposite directions and means adapted to drive said second member from said driving' member in opposite directionsl alternately in opposition to a force tending to reversethe rotation of said second mem` ber, a shiftable band-brake cooperating with said second member and operating automatically when shifted in opposite directions, to stop said second member in its rotation in` either direction when reversely rotated by such a force, and means operatingr automatically upon saidfirst-named means to cause the latter to operate said second member automatically in opposite directions and automatically shift said band-brake to position the latter for automa-tic operation in-the reverse rotation of said second member by such a force.

17. The combination of a drivingmember, mechanism driven thereby and including a second, rotatable, member adapted to be rotated in opposite directions and means adapted t-o drive saidseeond member fromy said driving member in opposite directions alternately 1n oppositon to a force tendingI to reverse the rotation of said second member` a band-brake, a movable member to which said band-brake is connectedoperating when moved in opposite directions to position the brake for stopping said second member in either direction of movement. when reversely rotated, under. the action of such a force, and means operatingr automatically upon said first-named means to cause the latter to operate saidseeond member au tomatically in opposite directions and automatically shift said movable member, for the purpose set forth.

18. The combination of a driving member, mechanism driven thereby and including a second, rotatable, member adapted to be rotated in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately in opposition to a force tendingr toreverse the rotatonof said second member. a band-brake, a rock-shaft, an arm on said rock-shaft and connected with said band-brake and operating When actuated in opposite directions to shift the band-brake and move its connection with said arm out of alinement with the axes of said second member and said rock-shaft from one side to the other, and means operating automatically upon said first-named means to cause the latter to operate said' second member automatically in opposite directions and automatically shift said rock-shaft, for the purpose set forth.

19. The combinationV of a driving member', mechanism driven thereby and including a second, rotatable, member adapted to be rotated in opposite directions and means adapted'to drive said second member from said driving member in opposite directions alternately in opposition to a force tending to reverse the rotation of said second member, a'band-brake, a rock-shaft, an arm on said rock-shaft and 'connected with said band-brake and operating when actuated in opposite directions to shift the band-brake and move its connection with said arm out Vof alinement with the axes of said second member and said rock-shaft from one side to the other, said rock-shaft carrying an eccentrically disposed member adapted to move Withsaid rock-shaft from one side to the other of perpendicular position and eX- v ert a pulling action on said band-brake, and

means operating automatically upon said first-named means tov cause the latter to operate said second member automatically in yto alternately engage with said shaft to alternately actuate said gear mechanisms for driving the drum in opposite directions, a rock-member provided with a crank portion, a band-brake cooperating. with said drum and connected with said crank portion, anfarm onv said rock-shaft and adapted tomove in the movement of, said-rockshaft in opposite directions, from one side to the other of perpendicular position, a sec- Eond rock-shaft, means operated by said drum in the movement of the latter in'one direction fori'actuating said second rock-shaft in one direction after said drum has rotated in one direction a predetermined number of times and `for actuating said second rockshaft in thel opposite direction YWhen said drum has rotated in the opposite direction a predetermined numberof times and means actuated `by said second shaft for shifting said clutches, means actuated by said second rock-shaft for rocking said first referred to rock-shaft in opposite directions, and means operating automatically to actuate said second rock-shaft for automatically reversing the rotation of said drum.

2l.. The combination of a driving meinber, mechanism driven thereby and including a second, rotatable, member adapted to be rotated infopposite directions and means adapted to drive said secondY member from said driving member in opposition to a force tending to reverse the rotation of said second member, brake mechanism cooperating with said mechanism and shiftable to position said brake mechanism for automatically stopping said rotatable member in its rotation when reversely rotated by such a force, means for disconnecting said first-named mechanism from said driving member, and automatically operating means' for shifting said brake members constructed and arranged to permit said brake mechanism to remain in operative position for performing the braking function until after the force tending t0 reversely rotate said second member has been removed.

22. The combination of a driving member, mechanism driventhereby and including a second, rotatable, member adapted to be rotatedin opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately in opposition to a force tending to reverse the rotation of said second member. vbrake mechanism cooperating With said first referred to mechanism and shiftablc to position said brake .mechanism for automatically stopping said rotatable member in its rotation in either direction When Vreversely rotated by such a force, means operating automaticallyto disconnect said 'firstnamed mechanism from said driving member, and automatically operating means for shifting said brake mechanism constructed and arranged to permit said brake'mechanism to remain in operative position for performing the brakingvfunction until after the force tending to reversely rotate said second member has been removed.

23. The combination of a driving meniber, mechanismI driven thereby andino-luding a second, rotatable, member adapted to be rotated in opposite directionsl and means adapted to drive said second member from said driving member in opposition to a force tending to reverse the rotation of said second member, brake mechanism cooperating with said first-named mechanism and shiftable to position said brake mechanism for ing said brakemechanism constructed and arranged to permit said brake mechanism to remain in operative position for performing the braking function until after the force tending to reversely rotate said second member has been removed.

24. The combination of a driving member, mechanism driven thereby and including a second, rotatable, member adapted to be rotated in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately in opposition to a force tending to reverse the rotation of said second member, brake mechanism cooperating with said first referred to mechanism and shiftable to position said brake mechanism for automatically stopping said rotatable member in its rotation in Veither direction when reversely rotated by such a force, means operating automatically to disconnect said first-named vmechanism from said driving member, and automatically operating means operated by said second member for shifting said brake mechanism construction and arranged to permit said brake mechanism to remain in operative position for perfoming the braking function until after the force tending to reversely rotate said second member lhas beenl removed.

25'. The combination of a driving member, mechanism driven thereby and including a second, rotatable, member adapted to be rotated in opposite directions and means adapted to drive said second member from said driving member in opposition to a. force tending'to reverse the rotation of said second member, band-brake mechanism cooperating with said second member and involving a band through the medium of which the braking is effected, and a rock-member operating when shifted to position said band for automatically stopping said rotatable memberin its rotation when reversely rotat-ed by such a force, means for disconnecting said first-named mechanism from said driving member, and automatically operating means for shifting said rock-member constructed and arranged to permit said brake mechanism to remain in operative position for performing theV braking function until after the force tending to reversely rotate said second member has been removed.

26. The combination of a driving member, mechanism driven thereby and including a second, rotatable, member adapted to be rotated in opposite direction and means adapted to drive said second member from said driving member in opposition to a force tending to reverse the rotation of said sccond member, brake mechanism cooperating with said mechanism and shiftable to position said brake mechanism for automatically and automatically operating means for shifting said brake mechanism constructed and arranged to permit said brake mechanism to remain in operative position for performing the braking function until after the force tending to reversely rotate said second member has been removed.

27. The combination of a driving member, mechanism driven thereby and including a second member adapted to be moved in opposite directions and means including clutch mechanism adapted to drive said second member from said driving member in opposite directions alternately, and means operated by said first-named mechanism and operating automatically upon said clutch mechanism, to cause said first-named means to operate said second member automatically in opposite directions, including a device operated by said first-named mechanism for automatically operating upon said clutch mechanism to cause the latter to be in neutral position, in which said second member is out of driving engagement with said driving member, and a device operating to thereafter cause said clutch mechanism to be in a position for driving said second member in a reverse direction.

28. The combination of a driving member, mechanism driven thereby and including a second member adapted to be moved in opposite directions and means including clutch mechanism adapted to drive said second member from said driving member in opposite directions alternately, and means operated by said first-named mechanism and operating automatically upon said clutch mechanism, to cause said first-named means to operate said second member automatic-ally in opposite directions, including a device operated by said first-named mechanism for automatically operating upon said clutch mechanism to cause the latter to be in neutral position, in which said second member is out of driving engagement with sai-d driving member, and a device operating to thereafter cause said clutch mechanism to bc in a position for driving said second member in a reverse direction, and means for regulating the interval during which said second member is out of driving engagement with said driving member.

29. The combination of a driving member, mechanism driven therebyy and including a second member adapted to be ymoved in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately, and means operating automatically upon said first-named means, to cause the latter to operate said second member automatically in Aopposite directions, including an automatically-operated device automatically operating upon said first-named means to cause the latter to be in neutral position, in which said lso second member is out of engagement with said driving member, and a device operating to thereafter cause said first-named means to bein a position for driving said second member in a reverse direction.

30. The combination of a driving member, mechanism driven thereby and including a second member adapted to be moved in opposite directions and means adapted to drive said second member from said driving member in opposite directions alternately, and means operated by said mechanism and operating automatically upon said first-named means, to cause the latter to operate said second member automatically in opposite directions, including a device operated by said mechanism for automatically operating upon said first-named means to cause the latter to be in neutral position, in Which said second member is out of driving engagement with said driving member, and a device operating after a predetermined time interval, to cause said first-named means to be in a position for driving said second member in a reverse direction.

31. The combination of a driving meinber, mechanism driven thereby and mcluding a second member adapted to be moved in opposite directions and means Vadapted to drive said second member from said driving member in opposite directions alternately, and means operating automatically upon said rst-named means to cause the latter to operate said second member automatically in opposite directions including a member which in its movements controls said first-namedV means and means for retarding the movement of said member thereby to produce a predetermined time interval between the arresting of the rotation of said seco-nd member and thel beginning of the rotation thereof in the opposite direction. f Y

32. The combination of a driving member, mechanism driven thereby and including a second member adapted to be I noved in opposite directions and means, including clutch mechanism, adapted to drive saidk second m-ember from said driving member in opposite directions alternately, and means operating automatically upon said clutch mechanism, to cause said first-named means to operate said second member automatically in opposite directions including an automatically-operating device automatically operating upon said clutch mechanism to cause the latter to be in neutral position, in which said second member is out of driving engagement with said driving member, a

.third member controlling the positioning of said clutch mechanism to drive said Vsecond member in the reverse direction, and means for retarding the movement of said third member, to cause a. predetermined time interval to lapse between the arresting of the matically stopping said rotatable member in its rotation when reversely rotated by such a force, automatically operating means for shifting said brake mechanism constructed and arranged to permit said brake mechanism to remain in operative'position for performing the braking function until after the forceY tending to' reversely rotate said second member has been removed, and means for causing a predetermined time interval to elapse between the *arresting of the rotation of saidV second member and the commencement of its rotation in the opposite direction.

84. The combination of ay driving member, mechanism driven thereby andincluding a second, rotatable member adapted to be rotated in opposite directions and means adapted to drive said second member from said driving member in opposition to a force tending to reverse the rotation of saidrsecond member, brake mechanism co-operating with said mechanism and shiftable to position said brake mechanism for automatically stopping said rotatable member in its rotation when reversely rotated by such a force, automatically operating means for shifting said brake mechanism constructed and arranged to permit said brake mechanism to remain in operative position for performing the braking function until 'after the force tendingto reversely rotate said second member has been removed, and means for causing a predetermined time interval to elapse between the arresting of the rotation of said second member and the comtending to reverse the rotation of said sec-` ond member and including clutch mechamsm and means operating automatically to shift said clutch mechanism into neutral condition Yand thereafter into a position Vwherein said second member isrotated reversely to the direction in which it was previously rotated, brake mechanism co-operat ing with said mechanism and shiftable to position said brake mechanism for automatically stopping said rotatable member in its rotation when reversely rota-ted by such a force, and automatically operating means for shifting said bra-ke 'mechanism constructed and arranged to permit. said brake mechanism to remain in operative position for performing the braking functionuntil after the force tending to reversely rotate said second member has been removed.

- ROBERT E. GURLEY. 

